event: Don't write duplicate logs to stdout and stderr in no UI case

This code would duplicate messages to stdout and stderr when no UI connected
and there were error level messages.

Rework the code so it either uses stderr (for errors and above) or
stdout for warnings/debug but not both for the same messages.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 17 insertions, 10 deletions

diff --git a/lib/bb/event.py b/lib/bb/event.py
index 3827dcfba..526c41f56 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -149,23 +149,30 @@ def print_ui_queue():
 
         # First check to see if we have any proper messages
         msgprint = False
+        msgerrs = False
+
+        # Should we print to stderr?
+        for event in ui_queue[:]:
+            if isinstance(event, logging.LogRecord) and event.levelno >= logging.WARNING:
+                msgerrs = True
+                break
+
+        if msgerrs:
+            logger.addHandler(stderr)
+        else:
+            logger.addHandler(stdout)
+
         for event in ui_queue[:]:
             if isinstance(event, logging.LogRecord):
                 if event.levelno > logging.DEBUG:
-                    if event.levelno >= logging.WARNING:
-                        logger.addHandler(stderr)
-                    else:
-                        logger.addHandler(stdout)
                     logger.handle(event)
                     msgprint = True
-        if msgprint:
-            return
 
         # Nope, so just print all of the messages we have (including debug messages)
-        logger.addHandler(stdout)
-        for event in ui_queue[:]:
-            if isinstance(event, logging.LogRecord):
-                logger.handle(event)
+        if not msgprint:
+            for event in ui_queue[:]:
+                if isinstance(event, logging.LogRecord):
+                    logger.handle(event)
 
 def fire_ui_handlers(event, d):
     global _thread_lock